Celebrate the diamond anniversary of what's regarded as the first official Billboard ranking.
Seventy-five years ago today, Billboard published its first chart ranking the sales of recorded songs.
In the July 27, 1940, issue, the maiden 10-position "National List of Best Selling Retail Records" paved the way for seven decades - and counting - of Billboard's hallmark tracking of music popularity.
Subsequently, the Billboard 200 would begin showcasing the top-selling weekly albums as of March 24, 1956. The premise introduced on this date 75 years ago of ranking the best-selling songs in the U.S. would expand to include a radio airplay component, spurring the birth of the Billboard Hot 100 as the premier national singles chart in the Aug. 4, 1958, issue. (Meanwhile, recent years have brought the Streaming Songs, real-time Billboard + Twitter and Billboard Artist 100 charts.)